...have you checked out the script for "Images"? e.g...
onLoad() {
// number of images
numimages = 4;
// total width (not worked out yet)
total = 0;
// the image we are expanding (none yet)
expanding = NULL;
// gap between images
gap = 10;
// approach factor (high will be slower expand/contract)
rate = 0.9;
}
...of course you have to create a new MovieClip for each image.